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m in (-oo:+oo)
(2/3)*((3/4)*m-(1/6)) = m+1/3 // - m+1/3
(2/3)*((3/4)*m-(1/6))-m-(1/3) = 0
(2/3)*((3/4)*m-1/6)-m-1/3 = 0
2/3*(3/4*m-1/6)-m-1/3 = 0
(2/3*3*(3/4*m-1/6))/3+(3*(-m))/3-1/3 = 0
2/3*3*(3/4*m-1/6)+3*(-m)-1 = 0
-3/2*m-1-1/3 = 0
-3/2*m-4/3 = 0
(-3/2*m-4/3)/3 = 0
(-3/2*m-4/3)/3 = 0 // * 3
-3/2*m-4/3 = 0
-3/2*m-4/3 = 0 // + 4/3
-3/2*m = 4/3 // : -3/2
m = 4/3/(-3/2)
m = -8/9
m = -8/9
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